PD CLC/TS 50612:2013

This Technical Specification provides guidance on the selection, use and maintenance of portable electrical apparatus conforming to EN 50379 1 [4] and EN 50379 2 [5] or EN 50379 3 [6] designed to measure combustion flue gas parameters of Type B and Type C gas-fired central heating boilers (hereafter referred to as boilers) using 1st, 2nd or 3rd family gases in domestic premises as a diagnostic instrument to assist an operative: a) in confirming satisfactory combustion at the time of commissioning, in accordance with appliance instructions or national or local regulations or standards; b) in confirming satisfactory combustion at the time of servicing in accordance with national or local regulations or standards or following servicing in accordance with appliance instructions; c) in confirming satisfactory combustion following maintenance, in accordance with appliance instructions or national or local regulations or standards. NOTE 1 Type B and Type C classification of gas-fired appliances are described in CEN/TR 1749 [1]. NOTE 2 Existing national or local regulations or standards conflicting with the guidance in this Technical Specification have precedence over this guidance. NOTE 3 It is not the intention of this Technical Specification to suggest that portable electrical combustion flue gas analysers are to be used as a substitute for normal service and maintenance carried out in accordance with the appliance instructions. Clause 9 describes how analysers can be used in conjunction with the appliance instructions. NOTE 4 EN 50379 1 [4] specifies general requirements for the construction, testing and performance of portable spot reading apparatus designed to check the combustion performance of heating appliances in domestic premises, using commercially available fuels. NOTE 5 EN 50379 2 [5] is for apparatus intended to be used for statutory measurements. In several European countries, legal requirements exist for the performance of heating appliances (see informative Annex A of EN 50379 1:2012 [4]). Legal consequences resulting from performance measurements makes for strict requirements for the apparatus used (see normative Annexes B and C of EN 50379 1:2012 [4]). NOTE 6 EN 50379 3 [6] is for apparatus intended to be used for non-statutory applications, which allows for reduced performance requirements for the portable electrical apparatus. NOTE 7 This Technical Specification deals with the determination of levels of combustion gases such as carbon monoxide (CO) and carbon dioxide (CO2) in combustion products from boilers. Combustion products from boilers will contain nitrogen oxides (NOX), predominantly nitrogen monoxide (nitric oxide, NO) and nitrogen dioxide (NO2). This Technical Specification does not deal with the measurement of combustion products such as NOX and aldehydes.